How Old Is California as a State
California became the 31st U.S. state on September 9, 1850, making it one of the earliest states admitted after the Mexican-American War. As of the newest public census estimates, California remains the most populous state in the country with over 39 million residents.
The territory was ceded to the United States in 1848 under the Treaty of Guadalupe Hidalgo, and the Gold Rush accelerated statehood efforts just two years later. Today California ranks first in GDP among all U.S. states, with a nominal output exceeding $3.6 trillion, according to the Bureau of Economic Analysis Bureau of Economic Analysis.
Key Historical Milestones and Founding Dates
The first European exploration of the California coast was led by Juan Rodríguez Cabrillo in 1542, but Spanish colonization did not begin in earnest until the late 18th century. The Presidio of San Francisco and Mission San Diego de Alcalá were established in 1769, forming the earliest permanent European settlements.
Spanish and Mexican Period
California remained under Spanish rule until Mexican independence in 1821, and then under Mexican sovereignty until the Mexican-American War. The secularization of the missions between 1833 and 1836 redistributed land into large ranchos, reshaping the economic and social structure of the region.
Path to Statehood
The discovery of gold at Sutter's Mill in Coloma in January 1848 triggered a massive migration, and the U.S. Constitution formally admitted California as a free state in 1850 as part of the Compromise of 1850.
California's Modern Economy and Global Standing
California's economy is now driven by technology, entertainment, agriculture, and trade, with Silicon Valley hosting major companies such as Apple, Alphabet, and Meta Forbes. The state also houses the headquarters of Tesla Tesla and SpaceX SpaceX, reinforcing its position as a center for innovation and aerospace.
In global rankings, California's GDP places it among the top five economies worldwide if it were an independent nation, behind only the United States, China, Japan, and Germany SEC. The state's agricultural sector remains the largest in the nation, producing over a third of the country's vegetables and two-thirds of its fruits and nuts.